You may have the issue that surfaced recently (December 2010-January 2011)
that the standard FAQ http://support.microsoft.com/kb/977116 steps will not
**First**, you will need to change yours DNS servers to resolve the issue. The
theory is that somewhere along the line, caching DNS/proxy servers have
corrupt/bad information that impacts some, but not all US users.
Go to http://www.dnsserverlist.org/ which will automatically determine the
best DNS servers based on your IP address. Pick two and carefully get the IP
**Next**, you will need to change your network settings on your Windows Media
Center PC(s) to use these. This will override any settings on your router
and/or the DNS settings provided by your ISP via DHCP:
1. Start Menu, Control Panel
2. Select "Network And Internet"
3. Select "Network and Sharing Center"
4. Select "Change adapter settings" on the left side of the screen
5. Right-click your network adapter and then select properties from the menu.
(For example: "Wireless Network Connection" or "Local Area Connection")
6. On the Networking tab, double-click "Internet Protocol Version 4
7. Check "Use the following DNS server addresses"
8. Carefully type in the DNS Server IPs you want to use.
9. Click Ok and ...